The news leaves Swansea with a selection headacheSwansea City’s Federico Fernandez and Kyle Bartley have lost their fitness battle ahead of the vital Liberty Stadium clash with Chelsea.
The two defenders had been struggling with knee injuries in the wake of last weekend’s 5-0 humbling at Manchester City, with manager Carlos Carvalhal saying the pair would undergo scans on Friday.
And it is understood the defensive duo have been ruled out of the meeting with the Blues, leaving Carvalhal with a defensive headache, with winger Luciano Narsingh also struggling for fitness.
The Portuguese has preferred to field a five-man defence, but the loss of two of his four specialist centre-halves leaves him short of options.
He could be tempted to slot in Kyle Naughton in center of the defense and hand Connor Roberts a first Premier League start at right wing-back.
Alternatively, he may choose to pair Mike van der Hoorn and Alfie Mawson in the middle of a four-man defence, with Naughton and Martin Olsson as orthodox full-backs.
Speaking on Thursday, Carvalhal had said: “We will have to wait for the scans. If they are out we will see if we can play with four or five (at the back).”
Fernandez suffered his injury in a challenge on Raheem Sterling at the Etihad Stadium, conceding a penalty in the process, while Bartley stretched a ligament in his knee.
Swansea were already without long-term absentees Leroy Fer (Achilles) and Wilfried Bony (knee), although Renato Sanches could be in contention after playing a part in full training this week.